Microprocessor based flow rate and flow volume indicator common for any flow sensor which gives pulse output

摘要

Design of an Intel 8085 Microprocessor based flow rate and now volume indicator common for both Turbine flowmeters and vortex shedding flow meters are given. The above indicator can be used not only for the above two types of now meters but also for any other flowmeter which gives pulse output. The flowmeter can be used in any medium (liquid or gas). The only required information for the design are the Maximum Flow Rate and the mean "Meter Factor" of the flow meters; the design is applicable for flowmeters of any size/diameter. The mean "Meter Factor" should be present at site using 4 thumb wheel switches before the operation of the meter. The maximum flowrate and mean "meter factor" values of the flowmeter are used to decide the setting of the 5th Thumb wheel switch which in turn decides one of the four set durations for which the pulses from the flow sensor are to be counted periodically for calculation of flow rate information. The microprocessor reads the settings of the 5 Thumb wheel switches and pulse counter contents and calculates the flow rate and flow volume and displays them in digital form. The paper gives the block diagram and the flow chart for the operation of the indicator.